CLASSIFICATION OF IGNEOUS ROCKS 



657 



TABLE IV. 



LAURDALOSE (lAUDALITe), WEST OF POLLEN, LAUGENDAL, 



NORWAY. 



Brogger, W. C, Die Eruptivgesteine des Christiania Gebietes, Vol. Ill, p. 19. 





522 (Si0 2 ) 

 139 (Na 2 0) 



: 6l 



2sio; 



4SiO„ 



K„O.Al 2 3 .6SiO„ 



NaoO.AUO^.eSiO 



Na^O.ALO. 



Na^O.Fe^O 

 •CaO.SiO; 



MgO.SiO, 

 'FeO.SiOo" 



2MgO.SiO„ 



2FeO.SiOo* 



FeO.Fe„0* 3 



FeO.TiC 



3 CaO.P„0 5 



56 X 556 

 61 X 524 

 78 X 284 



4 X 462 

 31 X 116 ■ 

 24 X 100 



7 X 132 . 



5 X 70 

 1 X 102 



8 X 232 

 12 X 152 



S X 310 



= orthoclase = 

 = albite = 



= nephelite = 

 = acmite = 



= diopside = 



= olivine = 



= magnetite = 



= ilmenite = 



= apatite = 



H.,0 = 



3i-i4 

 31.96 

 22.15 



6.92 . 



.46 



1.86 

 1.82 

 i-55 



63.10 j 

 22.15 ) 



8.771 



Sal 85.25 



.46 J- Fern 14.45 



3-bH 

 i-S5 



Sal _ 85.25 ^7^5 



Fem 14. 45 1 3 



Dosalane. 



order 6. 

 63.10 .7. 5 



22-15 1 3 



Norgare. 



100.41 



rang 1. 

 KoO' + Na-.O' _ ig 

 CaO' ~ ~q 



Laurdalase. 



'■>l 



SUBRANG 4. 

 K -°_ - il / 3 -^ I 



Na„0' 



139 



Laurdalose. 



